An annular belt type drying grate plate with an online self-cleaning structure

Abstract

The present invention proposes an endless belt drying grate plate with an online self-cleaning structure, which includes a supporting assembly component, a transfer positioning component, a supporting limiting component and a rotating support component. The endless belt drying grate plate adopts a plurality of fan-shaped supporting frames which are arranged in sequence to form an endless belt frame, which is convenient for assembly and layout, and a transfer frame is provided on the supporting frame to facilitate the installation of supporting beams and columns, and rotatable supporting balls are hung on the supporting beams and columns, and the ore blocks are supported by the supporting balls. The strength and rigidity in all directions are consistent, the system has high stability and strong bearing capacity. During the drying process of the ore blocks, the kinetic energy generated when the ore blocks fall onto the supporting balls or are removed from the supporting balls can drive the supporting balls to rotate, thereby preventing the remaining debris between the supporting balls from getting stuck and sticking, thereby realizing online self-cleaning of the grate plate, thereby ensuring the porosity and air permeability of the entire grate plate, and achieving a good cleaning effect without adding additional driving equipment.

Description

Technical Field

[0001] The present invention relates to smelting equipment, and particularly to an annular belt type drying grate plate with an online self-cleaning structure. Background Art

[0002] The main raw materials for blast furnace ironmaking are iron ores (sinter, pellet, natural lump ore), which are used to provide iron source, and coke, which mainly serves as a reducing agent, a heat generating agent, and a burden column skeleton. Under the condition of the same pig iron scale, realizing the substitution of lump ore for sinter or pellet is equivalent to reducing the consumption of standard coal by about 42 kgce (substituting sinter) or about 18 kgce (substituting pellet) for every 1 t increase in lump ore. By increasing the proportion of lump ore and establishing a new economic burden structure, it is the most direct and effective way to reduce costs.

[0003] In order to increase the proportion of lump ore charged into the furnace, the commonly adopted method at present is to control the moisture content of lump ore through lump ore drying, so as to improve the screening efficiency of lump ore, reduce the fine ore charged into the furnace, and ensure the air permeability of the blast furnace. The methods for lump ore drying mainly include: ① drying lump ore with a belt dryer; ② introducing the waste gas from the blast furnace hot stove to the blast furnace burden bin to dry lump ore; ③ using a shaft furnace or a rotary dryer in the lump ore yard to dry lump ore.

[0004] The grate bars of the belt dryer are conveying devices for transporting lump ore. During the drying process of lump ore, the grate bars work under high temperature for a long time, and overburning of lump ore causes blockage of the grate bars. The blocked grate bars form airtight dead grate bars, reducing the air extraction area, resulting in a serious decline in the heat exchange effect between lump ore and flue gas and an increase in production energy consumption. Therefore, the operator needs to continuously strike the grate bars with a steel bar to clean the broken materials blocked in the gaps of the grate bars. This process not only has a high labor intensity, but also the broken materials in the gaps cannot be cleaned thoroughly, and sometimes it is even too late to clean, unable to eliminate the adverse effects.

[0005] Patent document CN213670430U discloses a grate plate, which includes a grate plate main body and a vibration mechanism. Protective mechanisms are arranged on the outer sides of the grate plate main body, and the vibration mechanism is arranged on the outer surface of the grate plate main body. Fixing mechanisms are arranged on the inner side walls of the grate plate main body. An elastic steel plate is arranged on the outer surface of the grate plate main body, and second clamping blocks are connected to both outer ends of the elastic steel plate. Second clamping grooves are formed at both ends of the grate plate main body. Chutes are formed at both inner ends of the grate plate main body, and sliders are arranged inside the chutes. A dust removal cloth is connected to the outer sides of the sliders. Round holes are formed on the inner sides of the grate plate main body, and round mesh plates are arranged outside the round holes. When the vibration motor vibrates, the grate plate main body is driven to vibrate through a support rod, and then the elastic steel plate below the outer side of the grate plate main body is driven to vibrate, thereby enhancing the vibration effect, increasing the working efficiency, and playing a role in preventing blockage. However, this kind of grate plate needs to be provided with a vibration motor to drive the grate plate main body to vibrate, and further provided with a round mesh plate and positioning blocks. The round mesh plate can isolate larger pieces of materials from entering the ore tank. At the same time, normal materials smaller than the sieve holes can quickly fall into the ore tank. The round mesh plate can be conveniently disassembled through the positioning blocks to achieve the anti-blocking effect. More components need to be added, the equipment cost is higher, and it occupies a certain installation space. The anti-blocking effect is not good, and the vibration force is difficult to control. When the force is too large, the grate bars are easily damaged, and the probability of failure is higher. Therefore, it is necessary to optimize the structure of this kind of grate plate to overcome the above defects. Summary of the Invention

[0006] The purpose of the present invention is to provide an annular belt type drying grate plate with an online self-cleaning structure to improve its self-cleaning performance.

[0007] The technical solution adopted by the present invention to solve its technical problems is:

[0008] An annular belt type drying grate plate with an online self-cleaning structure, comprising:

[0009] Supporting and assembling components, several of which are provided, and each supporting and assembling component is respectively installed on the frame body to form an annular belt type structure, and an assembling space is provided inside it;

[0010] Transferring and positioning components, several of which are provided, and each transferring and positioning component is respectively installed on the supporting and assembling component;

[0011] Supporting and limiting components, several of which are provided, and each supporting and limiting component is respectively installed in the transferring and positioning component, and a gap is left between adjacent supporting and limiting components;

[0012] Rotating and supporting components, several of which are provided, and each rotating and supporting component is installed on the supporting and limiting component through a rotating structure and can rotate on the supporting and limiting component, and the lump ore is supported by the rotating and supporting component.

[0013] Specifically, the support assembly component includes:

[0014] The supporting frame is provided with a plurality of parts, each of which is a fan-shaped structure and is formed by joining profiles. Each of the supporting frames is arranged in sequence along a circular path to form a ring-belt type seat frame.

[0015] The transfer positioning component includes:

[0016] The transfer frame is provided with a plurality of parts, each of which is a fan-shaped structure and is formed by joining profiles. Its bottom edge is fixed to the top of the supporting assembly component through a connecting piece, and its top edge protrudes above the supporting assembly component.

[0017] The supporting and limiting components include:

[0018] The support beam is provided with a plurality of parts, each of which extends radially along the ring-belt type seat frame and is arranged in sequence along its circumference, with both ends of the support beam being respectively installed in the transfer positioning components, and a gap is left between adjacent support beams.

[0019] The rotating support member comprises:

[0020] The supporting balls are provided with several pieces, each of which is hung on the supporting beams and can rotate on the supporting beams. The supporting balls support the ore blocks, and gaps are left between adjacent supporting balls. When the ore blocks are loaded and unloaded on the supporting balls, the supporting balls can be driven to rotate, so that the crushed materials fall off from between the adjacent supporting balls to avoid blockage.

[0021] In one embodiment of the present invention, an axial limiting structure is provided on the support limiting member, and the axial limiting structure is adapted to the shape of the supporting ball. The axial limiting structure axially limits the supporting ball to prevent the supporting ball from axially sliding along the supporting beam.

[0022] The advantages of the present invention are:

[0023] The ring-belt drying grate plate adopts a plurality of fan-shaped supporting frames which are arranged in sequence to form a ring-belt seat frame, which is convenient for assembly and layout, and a transfer frame is arranged on the supporting frame to facilitate the installation of the supporting beams and columns. Rotatable supporting balls are hung on the supporting beams and columns to support the ore blocks. The strength and rigidity in all directions are consistent, the system has high stability and strong bearing capacity. During the drying process of the ore blocks, the kinetic energy generated when the ore blocks fall onto the supporting balls or when the ore blocks are removed from the supporting balls can drive the supporting balls to rotate, thereby preventing the debris left between the supporting balls from getting stuck and sticking, and realizing online self-cleaning of the grate plate, thereby ensuring the porosity and air permeability of the entire grate plate, and achieving a good cleaning effect without adding additional driving equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the endless belt type drying grate plate with online self-cleaning structure proposed by the present invention;

[0025] Figure 2 Schematic diagram of the monomer structure of the endless belt type drying grate plate;

[0026] Figure 3 It is a structural schematic diagram of the supporting frame and the transition frame. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0028] like Figures 1 to 3 As shown, the endless belt drying grate plate with online self-cleaning structure proposed by the present invention includes a supporting assembly component, a transfer positioning component, a support limiting component and a rotating support component. The supporting assembly component is provided with a plurality of pieces, each of which is respectively installed on the frame to form an endless belt structure with an assembly space inside. The transfer positioning component is provided with a plurality of pieces, each of which is respectively installed on the supporting assembly component. The supporting limiting component is provided with a plurality of pieces, each of which is respectively installed in the transferring positioning component, and a gap is left between adjacent supporting limiting components. The rotating support component is provided with a plurality of pieces, each of which is installed on the supporting limiting component through a rotating structure and can be rotated on the supporting limiting component, and the lump ore is supported by the rotating support component.

[0029] In Example 1, the supporting assembly component includes a supporting frame 100, which is provided with a plurality of parts, each of which is a fan-shaped structure and is formed by joining profiles. Each of the supporting frames is arranged in sequence along a circular path to form an annular belt-type frame.

[0030] The transfer positioning component includes a transfer frame 200, which is provided with a plurality of parts. Each transfer frame is a fan-shaped structure and is formed by joining profiles. Its bottom edge is fixed to the top of the supporting frame by a connecting piece, and its top edge protrudes above the supporting frame.

[0031] The support and limit member includes support beam rods 300, and several support beam rods are provided. Each support beam rod extends radially along the annular belt-shaped seat frame and is arranged sequentially along its circumferential direction. Its two ends are respectively installed in the transfer side frames, and there is a gap between adjacent support beam rods.

[0032] The rotating support member includes support balls 400, and several support balls are provided. Each support ball is respectively hung on the support beam rod and can rotate on the support beam rod. The ore block is supported by the support balls, and there is a gap between adjacent support balls. When the lump ore is loaded and unloaded on the support balls, the support balls can be driven to rotate, so that the crushed material falls off between adjacent support balls, avoiding blockage.

[0033] In this embodiment, the support ball is of an oblate structure, and the axial gap formed between adjacent support balls on each support beam rod is greater than the axial width of the support ball itself, so that the support balls on adjacent support beam columns can extend into this axial gap, making the support balls arranged staggeredly to form uniformly arranged pores.

[0034] In Embodiment 2, the support and assembly member includes support frames 100, and several support frames are provided. Each support frame is of a sector structure and is formed by joining profiles. Each support frame is arranged sequentially along a circular path to form an annular belt-shaped seat frame.

[0035] The transfer and positioning member includes transfer side frames 200, and several transfer side frames are provided. Each transfer side frame is of a sector structure and is formed by joining profiles. Its bottom edge is fixed to the top of the support frame through a connecting piece, and its top edge protrudes above the support frame.

[0036] The support and limit member includes support beam rods 300, and several support beam rods are provided. Each support beam rod extends radially along the annular belt-shaped seat frame and is arranged sequentially along its circumferential direction. Its two ends are respectively installed in the transfer side frames, and there is a gap between adjacent support beam rods.

[0037] The rotating support member includes support balls 400, and several support balls are provided. Each support ball is respectively hung on the support beam rod and can rotate on the support beam rod. The ore block is supported by the support balls, and there is a gap between adjacent support balls. When the lump ore is loaded and unloaded on the support balls, the support balls can be driven to rotate, so that the crushed material falls off between adjacent support balls, avoiding blockage.

[0038] In this embodiment, an axial limit structure is provided on the support beam rod, and the axial limit structure is adapted to the shape of the support ball. The support ball is axially limited by the axial limit structure to prevent the support ball from sliding axially along the support beam rod, so that the gap between adjacent support balls remains fixed.

[0039] In this embodiment, the support frame, the adapter frame, the support beam rods and the supporting balls are made of high chromium cast iron material containing 25% - 28% Cr, and the gap between adjacent balls is 8 mm.

[0040] From the occurrence of sticking and blocking in traditional annular coolers, it is mainly that materials gradually stick to the grate bars and heat insulation pads. The more materials stick, the smaller the moving gap between the grate bars and the heat insulation pads becomes, and finally the whole trolley is blocked. The main reason is that the grate bars are immovable and have no sufficient freedom. The two supporting ends on both sides of the grate bars of traditional annular coolers are square, and the contact surface with the heat insulation pads is a plane contact. Therefore, the grate bars are relatively fixed and immovable on the heat insulation pads, and this structure is not conducive to the shedding of the bonding substances between the grate bars.

[0041] The grate plate proposed by the present invention changes the grate bars into support beam rods and supporting balls, and the supporting balls can rotate freely on the support beam rods. When the dryer moves on the track, due to the fact that the supporting balls can rotate freely, the bonding substances stuck between the grate bars are also easy to fall off and are not easy to agglomerate.

[0042] In the description of the present invention, it should be noted that when terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", "left", "right" appear, they should be understood as based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, when terms such as "first" and "second" appear, they are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims

1. A ring belt type drying grate plate with an online self-cleaning structure, Characterized in that, Comprising: Support assembly members, several of which are provided, and each support assembly member is respectively installed on the frame body to form a ring belt type structure, and an assembly space is provided inside it; Adapter positioning members, several of which are provided, and each adapter positioning member is respectively installed on the support assembly member; Support and limit members, several of which are provided, and each support and limit member is respectively installed in the adapter positioning member, and a gap is left between adjacent support and limit members; Rotating support members, several of which are provided, and each rotating support member is installed on the support and limit member through a rotating structure and can rotate on the support and limit member, and the lump ore is supported by the rotating support member; The adapter positioning member includes: Adapter frames, several of which are provided, and each adapter frame is respectively a sector structure and is formed by joining profiles. The bottom edge thereof is fixed to the top of the support assembly member through a connecting member, and the top edge thereof protrudes upward from the support assembly member; The support and limit member includes: Support beam rods, several of which are provided, and each support beam rod respectively extends along the radial direction of the ring belt type seat frame and is arranged in sequence along its circumferential direction. The two ends thereof are respectively installed in the adapter positioning member, and a gap is left between adjacent support beam rods; The rotating support member includes: Supporting balls, several of which are provided, and each supporting ball is respectively hung on the support and limit member and can rotate on the support and limit member. The lump ore is supported by the supporting balls, and a gap is left between adjacent supporting balls; The supporting balls are oblate structures.

2. The ring belt type drying grate plate with an online self-cleaning structure according to claim 1, Characterized in that, The support assembly member includes: Support frames, several of which are provided, and each support frame is respectively a sector structure and is formed by joining profiles. Each support frame is respectively arranged in sequence along a circular path to form a ring belt type seat frame.

3. The ring belt type drying grate plate with an online self-cleaning structure according to claim 1, Characterized in that: An axial limiting structure is provided on the support and limit member, and the axial limiting structure is adapted to the shape of the supporting ball, and the axial limiting of the supporting ball is carried out by the axial limiting structure.

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